Results 111 to 120 of about 68,957 (199)

Episode-wise spectropolarimetry of GRB 220107A: Testing the hypothesis of evolving radiation mechanisms

Astronomy & Astrophysics
Context. The radiation mechanisms powering the prompt emission of Gamma-ray bursts (GRBs) remain a long-standing question, with both synchrotron and photospheric models offering plausible explanations.
Gupta R., Sonawane R., Iyyani S., Frederiks D., Racusin J., Chattopadhayay T., Castro-Tirado A. J., Valeev A. F., Gupta S., Tembhurnikar M., Ridnaia A., Svinkin D., Pandey S. B., Bhattacharya D., Sharma V., Bhalerao V., Dewangan G. C., Vadawale S., Sánchez-Ramírez R., Tsvetkova A.   +19 more
doaj   +1 more source

The Long-lived Broadband Afterglow of Short Gamma-Ray Burst 231117A and the Growing Radio-detected Short Gamma-Ray Burst Population

The Astrophysical Journal
We present multiwavelength observations of the Swift short γ -ray burst GRB 231117A, localized to an underlying galaxy at redshift z = 0.257 at a small projected offset (∼2 kpc). We uncover long-lived X-ray Chandra X-ray Observatory and radio/millimeter (
Genevieve Schroeder, Wen-fai Fong, Charles D. Kilpatrick, Alicia Rouco Escorial, Tanmoy Laskar, Anya E. Nugent, Jillian Rastinejad, Kate D. Alexander, Edo Berger, Thomas G. Brink, Ryan Chornock, Clecio R. de Bom, Yuxin Dong, Tarraneh Eftekhari, Alexei V. Filippenko, Celeste Fuentes-Carvajal, Wynn V. Jacobson-Galán, Matthew Malkan, Raffaella Margutti, Jeniveve Pearson, Lauren Rhodes, Ricardo Salinas, David J. Sand, Luidhy Santana-Silva, Andre Santos, Huei Sears, Manisha Shrestha, Nathan Smith, Wayne Webb, Simon de Wet, Yi Yang   +30 more
doaj   +1 more source

SIRI-2 Detection of the Gamma-Ray Burst 221009A

The Astrophysical Journal
SIRI-2 is a collection of strontium iodide gamma-ray detectors sensitive at approximately 400 keV to 10 MeV, launched on the Department of Defense's STPSat-6 to geosynchronous orbit.
Lee J. Mitchell, Justin D. Finke, Bernard Phlips, W. Neil Johnson, Emily Kong   +4 more
doaj   +1 more source

EXTRAGALACTIC GAMMA-RAYS: GAMMA RAY BURSTS AND BLAZARS

International Journal of Modern Physics A, 2005
The extragalactic gamma-ray sky is dominated by two classes of sources: Gamma-Ray Bursts (GRBs) and radio loud active galactic nuclei whose jets are pointing at us (blazars). We believe that the radiation we receive from them originates from the transformation of bulk relativistic energy into random energy.
openaire   +2 more sources

Identification and Modeling of Optically Thin Inverse Compton Scattering in the Prompt Emission of GRB 131014A

The Astrophysical Journal
The mechanism responsible for the prompt gamma-ray emission of a gamma-ray burst (GRB) continues to remain an enigma. The detailed analysis of the spectrum of GRB 131014A observed by the Fermi Gamma-ray Burst Monitor and Large Area Telescope has revealed
Pragyan Pratim Bordoloi, Shabnam Iyyani
doaj   +1 more source

Ground-based high energy astronomy [PDF]

The specific aim of the project at hand is to study the changes in amplitude and phase of VLF radio waves to see if we can detect the ionospheric disturbance (the change in electron density) caused by a Gamma-Ray burst.
Mcgruder, Charles H., III
core   +1 more source

A new class of weighted bimodal distribution with application to gamma-ray burst duration data. [PDF]

J Appl Stat, 2020
Sharifipanah N, Chinipardaz R, Parham GA.   +2 more
europepmc   +1 more source

BATSE software for the analysis of the gamma ray burst spatial distribution [PDF]

The Burst and Transient Source Experiment (BATSE) on the Gamma Ray Observatory (GRO) is designed to study astronomical gamma ray sources and to provide better positional, spectral, and time resolution about these objects than has previously been possible
Hakkila, Jon
core   +1 more source

Progress on SVOM Satellite Development

Kongjian kexue xuebao
SVOM (Space-based multiband Variable Object Monitor) is a Chinese-French space mission mainly designed to study Gamma-Ray Bursts. The satellite carries four instruments to detect and localize the prompt GRB emission and measure the evolution of the ...
WEI Jianyan
doaj   +1 more source

A Comprehensive Timing Analysis of Individual Pulses in X-Ray Bursts from SGR J0501+4516

The Astrophysical Journal Supplement Series
The pulses in X-ray-burst (XRB) light curves from soft gamma-ray repeaters (SGRs) are generally thought to arise from magnetic crustal fractures or magnetic reconnection, reflecting the evolution of the energy release process in magnetars. In this study,
Jiao-Jiao Yang, Shuo Xiao, Zheng-Huo Jiang, Tong-Lei Liao, Mei-Xin Hong, Xi-Hong Luo   +5 more
doaj   +1 more source